Unable to join, and a lot of errors

[misss520]

Task BungeeTask(sched=net.md_5.bungee.scheduler.BungeeScheduler@4b4dd216, id=29, owner=eu.blackfire62.myskin.bungee.MySkin@29be997f, task=eu.blackfire62.myskin.bungee.listener.OnLogin$1@3d158dbb, delay=0, period=0, running=true) encountered an exception

java.lang.NumberFormatException: For input string: "{"name":"xxx","id":"4d89f8e7"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:589)
at java.lang.Long.valueOf(Long.java:776)
at java.lang.Long.decode(Long.java:928)
at java.util.UUID.fromString(UUID.java:198)
at eu.blackfire62.myskin.shared.util.MojangAPI.getUUID(MojangAPI.java:37)
at eu.blackfire62.myskin.bungee.listener.OnLogin$1.run(OnLogin.java:45)
at net.md_5.bungee.scheduler.BungeeTask.run(BungeeTask.java:63)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
15:25:29 [WARNING] A task raised an exception. Task: net.md_5.bungee.connection.InitialHandler$6$1@6cfc5a82
java.lang.NullPointerException
at net.md_5.bungee.connection.InitialHandler$6$1.run(InitialHandler.java:553)
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:391)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.lang.Thread.run(Thread.java:750)